Scope1: harden control-plane watch timeout and drill traceability

[svelderrainruiz]

Summary

• add watch_timeout_minutes workflow-dispatch input to release-control-plane.yml with bounds validation and pass-through to runtime
• harden release-control-plane dispatch/watch failure mapping with deterministic release_dispatch_report_invalid and release_dispatch_watch_timeout
• harden race-hardening drill with dispatch-report validation and explicit control_plane_watch_timeout
• add explicit run-id traceability in drill evidence (contender_run_id, control_plane_run_id)
• update contracts and docs/runbook reason-code lists

Validation

• Invoke-Pester -Path ./tests -CI (236 passed)